Online publication: Oct. 20, 2009

URI

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DOI

https://doi.org/10.7202/900312ar CopiedAn error has occurred

A document of the journal Revue des sciences de l'éducation

Volume 6, Number 3, Fall 1980, p. 632–634

Tous droits réservés © Revue des sciences de l'eau, 1980